How to measure your boat for Fresh Air Exhaust installation:

All measurements need to be within 1/4" accuracy. There is some adjustment with the Fresh Air Exhaust when installing, but the more accurate the measurements, the better the fit.

First determine what type of exhaust outlet is on your boat. It will look like one of the pictures below.
If it looks like the picture on the left, measure from outside edge to outside edge of the black plastic part of the exhaust outlet. The measurement will be 4-1/2", 5-1/2" or 6".
If it looks like the picture on the right, measure the outside of the pipe. Lift the flapper and measure across the pipe. With this type of outlet, the measurement will be 3", 3-1/2", or 4".
If your boat has something different, call us at 512.647.7321.

Measurement "B" is the distance between the inside edges of the exhaust flanges or exhaust pipes.
If your boat has an exhaust flange like that in the picture above on the left, measure from the inside edges of the black plastic parts.
If your boat has an exhaust pipe like that in the picture above on the right, measure from the inside edge of the steel tube.

 

Next, draw a line across the tops of both exhaust flanges or exhaust pipes as shown in the pictures above and below. Measurement "C" is the distance from that line to the center of the propeller. Alternate method: If the boat trailer is on flat ground, measure from the ground to the line above the exhaust pipes and then measure from the ground to the center of the propeller (the two green lines). The difference between the two is measurement "C".

Measurement "D" is the distance from the line to the bottom of the swim platform. Teak (wood) swim platforms typically are not flat across the bottom. There is an upper layer of teak and a lower, supporting layer of teak. Either measurement will do.

Measurement "E" is the distance from the transom of the boat to the rear of trim tabs (see picture below). If your boat doesn't have trim tabs, then measurement "E" is zero.

 

The following information is needed to properly attach the Fresh Air Exhaust mounting system to your boat's swim platform.

The following diagram shows a Teak wood swim platform, looking at it from the rear.
Please note in the following diagram that measurement W1 is listed twice, on the left and on the right. Typically, they should be the same measurement.
Measurement W2 is for the center runner. If your boat does not have a center runner, then measurement W2 is zero.
Measurement W3 is to the outside edges of the left and right runners.
If your boat has more runners than this, we probably do not need that information.

 

The following diagram shows a Fiberglass swim platform, looking at it from the rear.
Please note in the following diagram that measurement F1 is listed twice, on the left and on the right. Typically, they should be the same measurement.
Measurement F2 is for the center bracket. If your boat does not have a center bracket, then measurement W2 is zero.
Measurement W3 is to the outside edges of the left and right brackets.
If your boat has more brackets than this, we probably do not need that information.

 

Installation is generally easy but does require the following tools, and knowledge of how to use the tools:

5/16" nut driver or socket wrench
Phillips screwdriver
1/2" wrench or adjustable wrench
hacksaw (to cut the mounting bracket all-thread to length)

You will also need silicone sealant to coat the threads of all screws going into the transom.